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      <title>如何配置Nginx以支持HTTP/3协议？ - 学习卡片</title>
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        <h1>如何配置Nginx以支持HTTP/3协议？ - 学习卡片</h1>
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        <div class="card-face card-front">
          <div class="card-category">特性</div>
          <div class="card-question">在 Nginx 中启用 HTTP/3 支持有哪些基本前提条件？</div>
          <div class="card-footer">点击卡片查看答案</div>
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          <div class="card-category">特性</div>
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            <div class="card-answer">需要 Nginx 版本 1.19.0 或更高版本，并且在编译 Nginx 时必须启用对 QUIC 和 HTTP/3 的支持。</div>
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          <div class="card-source">来源: 文档引言部分</div>
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          <div class="card-category">技术</div>
          <div class="card-question">从源代码编译 Nginx 以支持 HTTP/3 时，`./configure` 命令中必须添加哪两个关键的模块相关参数？</div>
          <div class="card-footer">点击卡片查看答案</div>
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          <div class="card-category">技术</div>
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            <div class="card-answer">必须添加 `--add-module=./ngx_http_quic_module` 以包含 QUIC 模块，以及 `--with-http_v3_module` 来启用 HTTP/3 模块。</div>
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          <div class="card-source">来源: 1.1 编译安装 Nginx（支持 HTTP/3）</div>
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          <div class="card-category">配置</div>
          <div class="card-question">在 Nginx 配置文件中，用于启用 QUIC 协议并监听相应端口的 `listen` 指令是什么？</div>
          <div class="card-footer">点击卡片查看答案</div>
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          <div class="card-category">配置</div>
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            <div class="card-answer">`listen 443 quic reuseport;` 这条指令用于在 443 端口上启用 QUIC 协议和端口重用。</div>
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          <div class="card-source">来源: 2.1 配置示例</div>
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          <div class="card-category">机制</div>
          <div class="card-question">Nginx 服务器如何向客户端宣告其支持 HTTP/3？使用了哪个 HTTP 响应头？</div>
          <div class="card-footer">点击卡片查看答案</div>
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          <div class="card-category">机制</div>
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            <div class="card-answer">服务器通过添加 `Alt-Svc` (Alternative Service) 响应头来通知客户端。示例配置为 `add_header Alt-Svc 'h3-23=":443"';`。</div>
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          <div class="card-source">来源: 2.1 配置示例 - 配置说明</div>
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          <div class="card-category">要求</div>
          <div class="card-question">根据文档，HTTP/3 的正常运行对 SSL/TLS 协议的哪个版本有强制性要求？</div>
          <div class="card-footer">点击卡片查看答案</div>
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          <div class="card-category">要求</div>
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            <div class="card-answer">HTTP/3 仅在使用 TLS 1.3 时有效，因此必须确保 SSL/TLS 配置支持并使用了 TLS 1.3。</div>
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          <div class="card-source">来源: 4. 注意事项</div>
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          <div class="card-category">实践</div>
          <div class="card-question">如何使用 `curl` 命令行工具来测试一个网站是否成功启用了 HTTP/3？</div>
          <div class="card-footer">点击卡片查看答案</div>
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          <div class="card-category">实践</div>
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            <div class="card-answer">可以使用 `curl` 命令并附带 `--http3` 参数进行测试，例如：`curl -I --http3 https://example.com`。</div>
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          <div class="card-source">来源: 3. 启动和验证</div>
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